Siemens Sinumerik 808D ADVANCED Training Manual page 105

ISO Mode
BASIC THEORY
G71 shaft roughing cycle
Programming structures:
G71 U(Δd)—R(e);
G71 P(ns)—Q(nf)—U(Δu)—W(Δw)—F—S—T
N(ns)...
...
...
N(nf);
P(ns) / Q(nf): Indicating start/end point of
Note：Please follow the specified structures when programming！
808D ADVANCED
finishing program block path
G71 sample program:
O0004;
G00 X200 Z10 M3 S800
G71 U2 R1
; each feed in 4 mm，retraction 2 mm
G71 P80 Q120 U0.5 W0.2 F200
; for a ~ e roughing，X axis allowance 1
mm
Z axis allowance 2 mm
N80 G00 X40 S1200
G01 Z-30 F100 ;machine a→b
X60 W-30 ;machine b→c finishing
W-20 ;machine c→d path
N120 X100 W-10 ;machine d→e
G70 P80 Q120 ;finishing a→e
M30
G72 radical roughing cycle
Programming structures:
G72 W(Δd)—R(e);
G72 P(ns)—Q(nf)—U(Δu)—W(Δw)—F—S—T;
N(ns)...
...
...
N(nf);
Note：Please follow the specified structures when programming！
Page 105
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P(ns) / Q(nf): Indicating start/end point of
finishing program block path
G72 sample program:
O0005;
G00 X176 Z10 M3 S500
G72 W2.0 R0.5
G72 P10 Q20 U0.2 W0.1 F300
N10 G00 X-55 S800
G01 X160 F120
X80 W20 ; machine a→b
W15 ;machine b→c
N20 X40 W20 ;machine c→a
G70 P10 Q20 ;finishing a→d
M30
Programming and Operating — Turning
finishing
path